Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Synthesis and Characterization of Low Molecular Weight Poly(methyl acrylate)-b-Polystyrene by a Combination of ATRP and Click Coupling Method

  • Hasneen, Aleya (Department of Polymer Science and Engineering, Pusan National University) ;
  • Kim, Su-Jeong (Department of Polymer Science and Engineering, Pusan National University) ;
  • Paik, Hyun-Jong (Department of Polymer Science and Engineering, Pusan National University)
  • Published : 2007.10.31
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Abstract

The combination of atom transfer radical polymerization (ATRP) and click chemistry was employed for the efficient preparation of well-defined block copolymers. Bromo terminated poly(methyl acrylate) (pMA-Br) was prepared by an ATRP initiator, ethyl-2-bromoisobutyrate (EBiB). Subsequently, the bromine chain end of pMA-Br was converted to an azide group by simple nucleophilic substitution reaction. ${\alpha}-Alkyn-{\omega}-bromo-functionalized$ polystyrene was also synthesized by ATRP using the alkyn-functionalized initiator, propargyl-2-bromoisobutyrate (PgBiB). In both cases, the conversion was limited to a low level to ensure a high degree of chain end functionality. Then the coupling reaction between the azide end group in $pMA-N_3$ and alkyn-functionalized PgBiB-pSt was performed by Cu(I)catalysis. This coupling reaction was monitored by gel permeation chromatography (GPC). The synthesized block copolymer was characterized by FT-IR, $^1H-NMR$ spectroscopy and $^1H-^1H$ COSY correlation spectroscopy.

Keywords

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